Simple operation 5 / 9 △ [4 / 5 - (1 / 5, 1 / 3)]

Simple operation 5 / 9 △ [4 / 5 - (1 / 5, 1 / 3)]

=5 / 9 (4 / 5-1 / 5-1 / 3)
=5 / 9 (3 / 5-1 / 3)
=5 / 9 (9 / 15-5 / 15)
=5 / 9 ／ 4 / 15
=5 / 9 × 15 / 4
=25 out of 12

Simple operation of 4 / 7 * 5 / 9 * 3 / 7 * 5 / 9?

5/9*（4/7+3/7）=5/9*1=5/9

Simple operation of 4 and 4 / 5 × (3 / 4 + 5 / 6) - 4 / 5 △ 2 / 9

4 (4 / 5) × (3 / 4 + 5 / 6) - (4 / 5) / (2 / 9)
=(24/5)×(9/12+10/12)-(4/5)*(9/2)
=(24/5)×(19/12)-(18/5)
=(38/5)-(18/5)
=20/5
=4

7 / 3 + (3 / 4-1 / 3) simple calculation

7 / 3 + (3 / 4-1 / 3)
=7/3-1/3+3/4
=2+3/4
=2 and 3 / 4
In the top right corner of my answer, click comment, and then you can choose satisfied, the problem has been solved perfectly

The simplest calculation method of 190 * 2.1 + 19 * 29

=19*21+19*29=19*（21+29）=19*50=950

1 yuan twice applied question 2
In the third year of grape planting, 6912kg grapes will be harvested this year and 4800KG grapes will be harvested in the first year. Based on the average annual growth rate of grape production last year and this year, what is the expected yield next year?

Let the growth rate be X
4800(1+X)^2=6912
X=20%
Next year's output = 4800 (1 + 20%) ^ 3 = 8294.4kg

Calculation questions: (a-b) &# 178; (a + b) &# 178; (A & # 178; + B & # 178;) &# 178; =?

(a-b)²(a+b)²(a²+b²)²=[(a-b)(a+b)]²(a²+b²)²=(a²-b²)²(a²+b²)²=[(a²-b²)(a²+b²)]²=[a^4-b^4]²
Hope to help you

Calculation questions: a (a + 2) &;

a(a+2)²
=a(a²+4a+4)
=a³+4a²+4a

I want to ask a practical question: 1 / 4 of a number is equal to 2 / 3 of another number, and the sum of these two numbers equals 66. How many are these two numbers? Please use a simple method to calculate, do not set X, y

If 1 / 4 of a number is equal to 2 / 3 of another number, then the - number is 2 / 3 / (1 / 4) = 8 / 3 of the second number (the ratio of two numbers can also be calculated by proportion)
So the second number is 66 / (1 + 8 / 3) = 18
The first number is 66-18 = 48

How much is 98 * 66 in Grade Four

Wrong (100-2) * 66 = 6600-132 = 6468